/*
 *  Copyright 2009 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements;

import java.util.Iterator;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.OutputUtilities;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class UpdateByPrimaryKeyWithBLOBsElementGenerator extends AbstractXmlElementGenerator {

	public UpdateByPrimaryKeyWithBLOBsElementGenerator() {
		super();
	}

	@Override
	public void addElements(XmlElement parentElement) {
		XmlElement answer = new XmlElement("update"); //$NON-NLS-1$

		answer.addAttribute(new Attribute("id", introspectedTable.getUpdateByPrimaryKeyWithBLOBsStatementId())); //$NON-NLS-1$

		String parameterType;
		if (introspectedTable.getRules().generateRecordWithBLOBsClass()) {
			parameterType = introspectedTable.getRecordWithBLOBsType();
		} else {
			parameterType = introspectedTable.getBaseRecordType();
		}

		answer.addAttribute(new Attribute("parameterType", //$NON-NLS-1$
				parameterType));

		context.getCommentGenerator().addComment(answer);

		StringBuilder sb = new StringBuilder();

		sb.append("update "); //$NON-NLS-1$
		sb.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
		answer.addElement(new TextElement(sb.toString()));

		// set up for first column
		sb.setLength(0);
		sb.append("set "); //$NON-NLS-1$

		Iterator<IntrospectedColumn> iter = introspectedTable.getNonPrimaryKeyColumns().iterator();
		while (iter.hasNext()) {
			IntrospectedColumn introspectedColumn = iter.next();

			sb.append(MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn));
			sb.append(" = "); //$NON-NLS-1$
			sb.append(MyBatis3FormattingUtilities.getParameterClause(introspectedColumn)); //$NON-NLS-1$
			if (iter.hasNext()) {
				sb.append(',');
			}

			answer.addElement(new TextElement(sb.toString()));

			// set up for the next column
			if (iter.hasNext()) {
				sb.setLength(0);
				OutputUtilities.xmlIndent(sb, 1);
			}
		}

		boolean and = false;
		for (IntrospectedColumn introspectedColumn : introspectedTable.getPrimaryKeyColumns()) {
			sb.setLength(0);
			if (and) {
				sb.append("  and "); //$NON-NLS-1$
			} else {
				sb.append("where "); //$NON-NLS-1$
				and = true;
			}

			sb.append(MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn));
			sb.append(" = "); //$NON-NLS-1$
			sb.append(MyBatis3FormattingUtilities.getParameterClause(introspectedColumn));
			answer.addElement(new TextElement(sb.toString()));
		}

		if (context.getPlugins().sqlMapUpdateByPrimaryKeyWithBLOBsElementGenerated(answer, introspectedTable)) {
			parentElement.addElement(answer);
		}
	}
}
